Recently an OTA update was released for the Samsung Galaxy S3I9300 for Android 4.1.2 XXEMD3. If you haven’t already updated your phone, you might want to check for updates and if you have, follow this tutorial in order to root Galaxy S3 I9300 on Jelly Bean 4.1.2. The process is highly simple, just make sure you follow the steps as they are. Before you begin though, you need to ensure that you have at least 50% battery left and that you have the correct USB drivers. Please note that the tutorial makes use of CF-Auto-Root. Moreover, please know that this tutorial will be applicable to root Galaxy S3 device alone.

The official version of Android 4.2.2 was leaked a while ago for Galaxy S3 I9300 codenamed I9300XXUFME3. It is now available for download updating the Galaxy S3 I9300 to Jelly Bean 4.2.2 JDQ39. Please know that this is an early release of the firmware so it is a test release and not the final version with the latter being released sometime in the near future. If you want to know how it might look like on your device, you can download and install this leaked update if you so wish. The firmware can be installed using Odin and the details of the firmware are as follows: